This is a force-directed network graph built with D3.js that visualizes connections between seven people across four groups. Nodes are rendered as white circles with thick red borders and blue labels, while links appear as orange lines weighted by an optional numerical value. The graph reads from a JSON file containing node and link definitions, and uses the d3.layout.force API to simulate physical forces, allowing users to click and drag nodes. The SVG canvas is styled with a green background, and the implementation relies on D3 v4 and v2 libraries.